package logging

import (
	"fmt"
	"github.com/gookit/color"
	"log"
	"os"
	"path/filepath"
	"runtime"
)

type Level int

var(
	F *os.File

	DefaultPrefix = ""
	DefaultCallerDepth = 2

	logger *log.Logger
	logPrefix = ""
	levelFlags = []string{"DEBUG","INFO","WARN","ERROR","FATAL"}

)

const (
	DEBUG Level = iota
	INFO
	WARNING
	ERROR
	FATAL
)

func Setup(){
	var err error
	filePath := getLogFilePath()
	fileName := getLogFileName()

	F,err = openLogFile(fileName,filePath)
	if err!=nil{
		color.Error.Printf("logging.Setup err: %v", err)
	}

	logger = log.New(F, DefaultPrefix, log.LstdFlags)
}

func Debug(v ...interface{}){
	setPrefix(DEBUG)
	logger.Println(v)
}

func Info(v ...interface{}){
	setPrefix(INFO)
	logger.Println(v)
}

func Warn(v ...interface{}){
	setPrefix(WARNING)
	logger.Println(v)
}

func Error(v ...interface{}){
	setPrefix(ERROR)
	logger.Println(v)
}

func Fatal(v ...interface{}){
	setPrefix(FATAL)
	logger.Println(v)
}

func setPrefix(level Level){
	_, file, line, ok := runtime.Caller(DefaultCallerDepth)
	if ok{
		logPrefix = fmt.Sprintf("[%s][%s:%d]", levelFlags[level], filepath.Base(file),line)
	}else{
		logPrefix = fmt.Sprintf("[%s]", levelFlags[level])
	}

	logger.SetPrefix(logPrefix)
}